Identification

Title

CESM1 Paleo Idealized Forcing

Alternative title(s)

d651052

Abstract

<p>Among other forcings, past climate variations have been driven by changes in the orbit of earth and greenhouse gas concentrations. These forcings often change concurrently, making it difficult to isolate specific climate responses from the paleoclimate record alone. Here, simulations are run with the NCAR CESM1.2 to isolate the climate responses to different past forcings. In each simulation, only one boundary condition is changed while others remain fixed at preindustrial levels, with the goal of isolating the climate response to individual forcings. The experiments are described below. In each simulation, parameters not mentioned are the same as the preindustrial simulation.</p> <p>Simulations: <ul><li>0ka_0urb: A preindustrial simulation, with the following parameters: Obliquity: 23.44107 degrees; Longitude of perihelion: 102.7242 degrees; eccentricity: 0.01670772; CO2: 284.7 ppm; Ice sheets: 0 ka.</li> <li>lo_obliq and hi_obliq: Obliquity is set to 22.079 or 24.480 degrees, respectively.</li> <li>0_AEQ, 90_WSOL, 180_VEQ, and 270_SSOL: Longitude of the perihelion is set to 0, 90, 180, or 270 degrees. This corresponds to perihelion at the Northern Hemisphere autumnal equinox, winter solstice, vernal equinox, or summer solstice, respectively. Eccentricity is set to 0.0493.</li> <li>ECC_0: Eccentricity is set to 0, resulting in a perfectly circular orbit.</li> <li>half_CO2: CO2 is set to 142.35 ppm, half of its preindustrial level.</li></ul></p> <p>If you are planning on using these simulations please contact the lead authors of the two reference papers shown below.</p> <p>Computing resources (ark:/85065/d7wd3xhc) were provided by the Climate Simulation Laboratory at NCAR's Computational and Information Systems Laboratory, sponsored by the National Science Foundation and other agencies.</p>

Resource type

dataset

Resource locator

https://gdex.ucar.edu/datasets/d651052/

protocol: https

name: Dataset Description

description: Related Link

function: information

https://gdex.ucar.edu/datasets/d651052/dataaccess/

protocol: https

name: Data Access

description: Related Link

function: download

Unique resource identifier

code

codeSpace

Dataset language

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

climatologyMeteorologyAtmosphere

Keywords

Keyword set

keyword value

dataset

originating controlled vocabulary

title

reference date

date type

revision

effective date

2021-03-30

Keyword set

keyword value

CESM > NCAR Community Earth System Model

originating controlled vocabulary

title

reference date

date type

revision

effective date

2025-10-03

Keyword set

keyword value

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > SEA LEVEL PRESSURE

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > UPPER AIR TEMPERATURE

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR INDICATORS > HUMIDITY > SPECIFIC HUMIDITY

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > U/V WIND COMPONENTS

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > WIND DYNAMICS > VERTICAL WIND VELOCITY/SPEED

EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > LIQUID PRECIPITATION > RAIN

EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > PRECIPITATION PROFILES > LATENT HEAT FLUX

originating controlled vocabulary

title

reference date

date type

revision

effective date

2025-10-03

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2018-05-29

Frequency of update

notPlanned

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Creative Commons Attribution 4.0 International License

Limitations on public access

None

Responsible organisations

Responsible party

organisation name

email address

datahelp@ucar.edu

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

NSF NCAR Geoscience Data Exchange

email address

datahelp@ucar.edu

web address

https://gdex.ucar.edu

name: NSF NCAR Geoscience Data Exchange

description: The Geoscience Data Exchange (GDEX), managed by the Computational and Information Systems Laboratory (CISL) at NSF NCAR, contains a large collection of meteorological, atmospheric composition, and oceanographic observations, and operational and reanalysis model outputs, integrated with NSF NCAR High Performance Compute services to support atmospheric and geosciences research.

function: download

responsible party role

pointOfContact

Metadata date

2025-10-09T01:32:06Z

Metadata language